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Castro sidelined with tightness in hamstring

MESA, Ariz. -- Cubs shortstop Starlin Castro will be sidelined two or three days because of tightness in his left hamstring, but he was able to participate in the bunting tournament Thursday.

"He's fine," Cubs manager Dale Sveum said of Castro, who pulled up as he ran to first base Wednesday and had to leave the game. "It'll be two or three days, but basically it's minimal -- there's more tightness. I don't think there's any pull. It just tightened up on him."

Castro did play catch along the right-field line under the watch of the Cubs' athletic trainers Thursday. He also hit in the batting cages and participated in the bunting tournament, reaching the Sweet 16 with a win over Rafael Lopez.

The Cubs are already thin because of injuries to their infielders. Third basemen Ian Stewart and Josh Vitters are both sidelined with strained left quads. Sveum said Vitters was slightly ahead of Stewart in their rehabs. Both were injured last Thursday, and both expected to be sidelined 10 to 14 days.